A4024752047920_9

Technical Service Bulletin
40 Noises from the front end and dash panel, noise is heard when the vehicle is moving
40 24 75 2047920/9 March 8, 2024. Supersedes Technical Service Bulletin Group 40 number 23-68 dated
September 7, 2023 for reasons listed below.
Model(s)
Year
VIN Range
Vehicle-Specific Equipment
All
Not Applicable
All Audi Vehicles 2020 – 2025
Condition
REVISION HISTORY
Revision
Date
Purpose
9
-
Revised Warranty (Updated Labor Operations)
8
09/07/2023
Revised Service (Updated Tip)
7
08/08/2023
Revised header (Added model years)
Revised Warranty (Updated Labor Operations)
Customer states:
• There is a buzzing, booming, humming, whistling, or a similar noise from the front end.
• The noises can possibly be heard from the steering area or behind the dash panel.
• The noises may also be perceived as tire rolling noises.
Workshop findings:
• The noises can be reproduced in a test drive.
Technical Background
Mechanical damage on the wheel bearing of the front axle.
Production Solution
Not applicable.
Service
The noises from the wheel bearing can be transmitted via the steering into the vehicle interior.
Because of the proximity, it can be difficult to distinguish wheel bearing noises from rolling noises.
© 2024 Audi of America, Inc.
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All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other
intellectual property rights of Audi of America, Inc., its affiliated companies, and its licensors. All rights are reserved to make changes at any time without notice. No part of this
document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may
these materials be modified or reposted to other sites, without the prior expressed written permission of the publisher.
Technical Service Bulletin
Therefore, with such noises, check whether the wheel bearings of the front axle may be the source and replace
the affected component. The following steps are helpful:
1. Does the frequency issue rise as the speed increases or does the sound get higher?
2. Does the noise get louder when steering?
3. Is the noise still present when slowing down?
4. Is the noise amplified on the steering wheel/airbag well?
5. Can the vibrations be felt on the unpressed coil spring when the wheel is turning?
Tip: Please precisely locate the source of the noise with acoustic testers and/or PICO tool. It is possible
that a noise perceived on the left side of vehicle is caused by the right wheel bearing. The front wheel
bearings should not be replaced in pairs.
If the cause of the noise cannot be traced to a wheel bearing, continue the analysis on other components.
Warranty
Claim Type:
• 110 up to 48 Months/50,000 Miles.
• G10 for CPO Covered Vehicles – Verify Owner.
• If vehicle is outside any warranty, this Technical Service Bulletin is informational
only.
Service Number:
4057
Damage Code:
0020
Replace wheel bearing
Labor Operation:
4057 5550
A4, A5 (minus Cabriolet), A6, A7, A8, e-tron GT,
Q5, Q7, Q8, and R8
4050 5550
See SRT with
associated
operations
GFF
No allowance
0 TU
Road test prior to service procedure
0121 0002
10 TU
Road test after service procedure
0121 0004
10 TU
Replace wheel bearing
A3, A5 Cabriolet, e-tron, Q3, Q4 e-tron, e-tron
quattro, Q8 e-tron, and TT
Diagnostic Time:
Claim Comment:
As per TSB 2047920/9
All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and Procedures
Manual. Claims are subject to review or audit by Audi Warranty.
© 2024 Audi of America, Inc.
Internal
Page 2 of 3
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other
intellectual property rights of Audi of America, Inc., its affiliated companies, and its licensors. All rights are reserved to make changes at any time without notice. No part of this
document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may
these materials be modified or reposted to other sites, without the prior expressed written permission of the publisher.
Technical Service Bulletin
Required Parts and Tools
Always check with your Parts Department and/or ETKA for the latest information and parts bulletins.
Part Number Part Description
Quantity
See ETKA
Wheel bearings
1
See ETKA
Fasteners, Bolts, Nuts, and Screws as needed per the Repair Manual
See ETKA/ELSA
Additional Information
All parts and service references provided in this TSB (2047920) are subject to change and/or removal.
©2024 Audi of America, Inc. All rights reserved. The information contained in this document is based on the
latest information available at the time of printing and is subject to the copyright and other intellectual property
rights of Audi of America, Inc., its affiliated companies, and its licensors. All rights are reserved to make changes
at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or
transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may
these materials be modified or reposted to other sites without the prior expressed written permission of the
publisher.
© 2024 Audi of America, Inc.
Internal
Page 3 of 3
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other
intellectual property rights of Audi of America, Inc., its affiliated companies, and its licensors. All rights are reserved to make changes at any time without notice. No part of this
document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may
these materials be modified or reposted to other sites, without the prior expressed written permission of the publisher.